The Mono discussion may be tiring, but the fact of the matter is that thanks to this discussion, various major Linux distributions are now making official statements detailing their position in the Mono/C# debate. The latest to do this is Ubuntu, which reiterated their position yesterday.

I've yet to be involved in a car crash. Hence there is no point in strapping myself in or having airbags in my car.

Colin Watson (of Ubuntu) quoth last month:

At present, were there to be an issue, Mono would be easy to extricate. Making it more of a core requirement is likely to encounter some performance concerns at present anyway, since the budget for desktop startup is increasingly tight as we work on boot performance.